{{ $p := . }}
{{ $basePath := path.Clean (urls.Parse .Site.BaseURL).Path }}
{{ if eq $basePath "/" }}
{{ $basePath = "" }}
{{ end }}
<nav class="justify-content-center nav nav-pills py-3">
    {{ range .Site.Menus.main }}
    {{ $pagePath := strings.TrimPrefix $basePath $p.RelPermalink }}
    {{ $menuPath := strings.TrimPrefix $basePath .URL }}
    {{ $active := or (and (eq $menuPath `/`) (eq $pagePath `/`)) (and (ne $menuPath `/`) (hasPrefix $pagePath $menuPath)) }}
    <a href="{{ .URL }}" class="nav-link{{ if $active }} active{{ end }}"{{ if $active }} aria-current="page"{{ end }}>{{ .Name }}</a>
    {{ end }}
</nav>